Carotid Arteries/Jugular Vein Flashcards
What artery is the main arteries (bilateral) to the head and neck?
Common Carotid Arteries (Left and Right)
Where does the common carotid artery split into the internal and external carotid arteries?
Within the carotid triangle
This artery enters the skull through the the carotid canal int eh temporal bone. What artery is this and what does it supply?
- Internal Carotid Artery
- Supplies blood to the brain
What artery is the main source of blood to the structures of the neck, face ans scalp?
External Carotid Artery
What artery supplies the structures if the head that are external to the skull?
External Carotid Artery
Waht are the eight (8) branches of the external carotid artery?
1) Superior Thyroid Artery
2) Ascending Pharyngeal Artery
3) Lingual Artery
4) Facial Artery
5) Occipital Artery
6) Posterior Auricular Artery
7) Superficial Temporal Artery
8) Maxillary Artery
What are the terminal branches of the external carotid artery?
1) Superficial Temporal Artery
2) Maxillary Artery
What is the slight dialation of the internal carotid artery where it joins the common carotid artery?
Carotid Sinus
What is the function of the carotid sinus?
-It is a baroreceptor (blood pressure sensor)
What nerve provides innervation to the carotid sinus?
Carotid sinus nerve, a branch of the glossopharyngeal nerve (CN IX)
How does the carotid sinus function to regulate blood pressure?
As a reflex. When BP is up, it causes heart rate to decrease
What is the small, reddish-brown mass located within or deep to the bifurcation of the common carotid artery?
Carotid body
Where is the carotid body located?
deep or within the bifurcation of the common carotid artery
What is the function of the carotid body?
It is a chemoreceptor which detects changes in the chemical makeup of the blood within the carotid
What is the nerve innervation of the carotid body?
The carotid sinus branch of the glossopharyngel nerve (CN IX)
How does carotid body function as a chemoreceptor to regulate the chemical makeup of the blood within the carotid artery?
If O2 is low or CO2 is high within the carotid, it causes a reflex to increase the rate and volume of resperation
What vascular structure of the neck is never visible topographically?
Internal Jugular Vein
What is usually the largest vein of the neck?
Internal jugular Vein
The internal jugular vein is a continuation of what dural venous sinus and it drains into what major vein?
It is an direct extension of the sigmoid sinus
It drains into the brachiocephalic vein
What is the dilation of the internal jugular vein at the origin below the jugular foramen?
Superior Jugular Bulb
What are the tributaries of the Internal Jugular Vein?
1) Inferior Petrosal Sinus
2) Pharyngeal Veins
3) Facial Vein
4) Lingual Vein
5) Superior Thyroid Vein
6) Middle Thyroid Artery
Which major vein of the neck DOES NOT drain into the internal jugular vein?
Inferior Thyroid Vein
What is the dilation of the internal jugular vein near the termination into the brachiocephalic vein?
Inferior Jugular Bulb
What is the significance of the inferior jugular bulb?
It contains a valve that prevents blood from backing up into the cranial vault
